Merge branch 'master' of git.yiisoft.com:yii2

Conflicts:
	framework/db/ar/ActiveFinder.php
	framework/db/ar/ActiveQuery.php

framework/db/ar/ActiveFinder.php

@@ -10,6 +10,7 @@
 
 namespace yii\db\ar;
 
+use yii\base\Object;
 use yii\base\VectorIterator;
 use yii\db\dao\Query;
 use yii\db\Exception;
@@ -45,6 +46,10 @@ class ActiveFinder extends \yii\base\Object
 	 * @var \yii\db\dao\Connection
 	 */
 	public $connection;
+	/**
+	 * @var ActiveQuery
+	 */
+	public $query;
 
 	public function __construct($connection)
 	{

framework/db/ar/ActiveQuery.php

@@ -12,6 +12,7 @@ namespace yii\db\ar;
 
 use yii\base\VectorIterator;
 use yii\db\dao\BaseQuery;
+use yii\db\dao\Expression;
 use yii\db\Exception;
 
 /**
@@ -155,12 +156,13 @@ class ActiveQuery extends BaseQuery implements \IteratorAggregate, \ArrayAccess,
 
 	public function value()
 	{
-		return 0;
+		$result = $this->asArray()->one();
+		return $result === null ? null : reset($result);
 	}
 
 	public function exists()
 	{
-		return $this->select(array('1'))->asArray(true)->one() !== null;
+		return $this->select(array(new Expression('1')))->asArray()->one() !== null;
 	}
 
 	/**
@@ -294,14 +296,4 @@ class ActiveQuery extends BaseQuery implements \IteratorAggregate, \ArrayAccess,
 		}
 		unset($this->records[$offset]);
 	}
-
-	protected function findRecords($all = true)
-	{
-		$finder = new ActiveFinder($this->getDbConnection());
-		if (!empty($this->with)) {
-			return $finder->findRecordsWithRelations();
-		} else {
-			return $finder->findRecords($this, $all);
-		}
-	}
 }